Self-binding harvester.



N0. 820,276. PATENTED MAY 8, 1906. A. N. WIENS.

SELF BINDING HARVESTER. APPLIoATIoN' FILED DEO.28,1904.

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luigentoz A ran N Wrens.

UNITED srngrns PATENT OFFICE.

SELF-BINDING HARVESTER.

Specification of Letters Patent.

Patented May 8, 1906.

Application filed December 28, 1904. erial No. 238,694.

To all whom it may concern:

Be it known that I, ARON N. WIENS, farmer, a British subject, and aresident of VVinkler, in the Province of Manitoba, in the Dominion ofCanada, have invented a new and useful Improvement in Self-BindingHarvester-Machinesto wit, an invention which I call a twine tensionofwhich the following is a specification.

My invention relates to tension devices, especially adapted for use inself-binding harvesters; and it consists in the constructions,combinations, and arrangements herein described and claimed.

An object of my invention is to provide a durable construction whichshall act with certainty to maintain an unvarying tension on the twine,thereby eliminating all danger of breakage and entanglement of thetwine.

A further object of my invention is to provide an improved constructionin which the twine will be automatically guided and maintained in properposition relative to the tension device, thereby insuring a uniformtension.

In the accompanying drawings, forming a part of this application, and inwhich similar reference-symbols indicate corresponding parts in bothviews, Figure 1 is a plan view illustrating an embodiment of myinvention, and Fig. 2 is a front elevation of the construction shown inFig. 1.

' Referring to the accompanying drawings, 1 indicates a bracket adaptedto be secured to the bottom of the packer-deck of a selfbindingharvester in position to lead the twine in a direct line from thetwine-box to the needle. hen so positioned, the bracket is secured tothe bottom of the packer-deck by bolts inserted in the openings 2, andthe twine is led from the twine-box, through an opening 3 in saidbracket, between a pair of ilitermeshing gears and onward to the need e.

Aframe 4 is pivotally secured to the bracket 1 by a bolt 5 and carriesat its outer end a V- toothed gear 6, arranged to intermesh with asimilar gear 7, journaled in the bracket. These gears are preferablyconstructed slightly conical, with their smaller diameters upward, andare each provided with teeth inclined axially in both directions fromsubstantially their mid portions. This construction of the teeth tendsto maintain the twine constantly at the mid portion of the gears andacts to automatically return the twine to such position upon itsaccidental displacement ineither direction therefrom. This form oftension-gear constitutes an important part of my invention, since itavoids all danger of breakage or entanglement of the twine bymaintaining it in proper position relative to the tension device.

Bolts 8 are shown extending through the bracket 1 and frame 4 at a pointintermediate of the pivotal support 5 of said frame and the gear 6,carried thereby. Springs 9, surrounding said bolts, are confined betweenthe frame 4 and nuts 10, threaded on the bolts, thereby providing meansfor maintaining the gears in mesh with a yielding pressure, which can bevaried by suitably adjusting the nuts 10 on their bolts. As shownespecially in Fig. 1, the springs 9 engage the frame 4 at pointsadjacent to its fulcrum 5, thus permitting the advantageous employmentof short heavy springs for maintaining the usual pressure between theintermeshing gears.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

1. A tension device comprising a pair of intermeshing V-toothed gears,and means for directing a cord therebetween, substantially as described.

2. A tension device comprising a pair of intermeshing V-toothed gears,means for directing a cord therebetween, and means for yieldinglymaintaining said gears in mesh, substantially as described.

3. A tension device comprising a bracket provided with a guide-aperturefor directing a cord, a frame pivotally supported on said bracket, apair of intermeshing V-toothed gears j ournaled, respectively, in saidbracket and frame with their pitch-circles substantially in the line ofsaid guide-aperture, and yielding means for maintaining said gears inmesh, substantially as described.

Dated at Morden this 10th day of Decem-. ber, A. D. 1904.

ARON N. WIENS.

Witnesses:

WILLIAM GEORGE MAoKENzIn, ANNIE RANKIN MOLAREN.

